turbo color hardisk is gone. CD drive not working either. Got scsi2sd adapter. Using dd on the mac to get nextstep3.3 image on the sd.
Turbo color back to life!

BUT want to install additional software.
Only have mac (poor guy) osx 10.9.5.
Got OSX fuse. Needed ufs file system module.
Help was found at https://wiki.gutzmann.com/confluence/pages/viewpage.action?pageId=665193
Thanks Thomas!
Finally here is the command to mount a Nextstep3.3 cd image
/usr/local/include/osxfuse/unixfs/ufs/ufs --dmg "/Users/manfred/Desktop/NextSTEP 3.3 CISC (Intel x86+Motorola 68k).iso" --type nextstep-cd /NS
where /NS is my mount point (directory /NS has to be created before mount)

Now next can connect to mac via ftp (did not succeed to make nfs work) and get all packages that I need.